🔌 Balboa Expander Board Pump (BP200UX) – Additional Pump Expansion Module

Ultra-compact expansion board to add one pump to your BP200UX control system with 15A fuse protection.

📋 Product Overview

This PCB is used in the BP200UX Balboa System to add a pump. The Balboa Expander Board for Pump (BP200UX) is designed to extend the pump capacity of BP200UX control boxes, allowing you to add one additional pump to your spa system.

This ultra-compact expansion module connects to your existing BP200UX main board and provides the additional relay and control circuitry needed to operate an extra pump, protected by a 15 AMP fuse for safe operation.

✨ Key Features

✅ 230V / 50Hz Operation – Designed for UK and European electrical systems

✅ Additional Pump Support – Controls one additional pump

✅ 15 AMP Fuse Protection – Built-in overcurrent protection

✅ Ultra-Compact Design – Smallest footprint at just 85mm × 41mm

✅ BP200UX Compatible – Designed specifically for BP200UX control boxes

✅ BP Series Integration – Works with Balboa BP series systems

🔧 Technical Specifications

Specification	Value
Brand	Balboa
Model / Series	BP
Product Type	Expander Board
Input Voltage	230V
Frequency	50Hz
Pump Support	One additional pump
Fuse Protection	15 AMP
Length	85 mm
Height	41 mm

✅ Compatibility Guide

Compatible Control Systems

Control System	Compatibility
BP200UX control boxes	✅ Compatible

⚠️ Important Compatibility Note

This PCB can only be used with a BP200UX system.

Cannot be used in conjunction with CB-EX231 – The CB-EX231 is a blower expander for the same BP200UX system. You must choose between adding a pump (this board) OR adding a blower (CB-EX231) – you cannot use both expanders together on the same system.

⚙️ Board Functions

Pump Expansion

Function	Specification
Additional Pumps	1
Fuse Rating	15 AMP

How It Works

The expander board connects to your BP200UX main control board and provides:

• Additional relay control for one pump
• 15A fuse protection for the pump circuit
• Integration with existing topside panel controls

Expander Choice for BP200UX

Expander	Part	Function	Can Use Together?
Pump Expander	This board (CB-EX233)	Add 1 pump	❌ No – choose one
Blower Expander	CB-EX231	Add 1 blower	❌ No – choose one

You must choose: Either add a pump OR add a blower to your BP200UX system – not both.

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🛠️ Installation Requirements

⚠️ IMPORTANT: Installation should be carried out by a qualified electrician or experienced spa technician.

Pre-Installation Checklist

• [ ] Verify you have a BP200UX control system
• [ ] Confirm you want to add a pump (not a blower)
• [ ] Ensure CB-EX231 blower expander is NOT installed
• [ ] Disconnect all power at the isolator/breaker
• [ ] Photograph existing wiring connections
• [ ] Allow capacitors to discharge (wait 5 minutes minimum)

Electrical Requirements

Requirement	Specification
Supply Voltage	230V
Frequency	50Hz
Fuse Rating	15 AMP (provided on board)
RCD Protection	Required (30mA recommended)
Earth Connection	Mandatory

💡 Tip: This board must be installed in conjunction with a compatible BP200UX main board – it cannot operate independently.

⚠️ Safety Warnings

Electrical Safety

• ⚠️ ALWAYS disconnect power before any work
• ⚠️ Installation by experienced tradesman or competent individual required
• ⚠️ Ensure correct voltage supply (230V, 50Hz)
• ⚠️ Verify RCD protection is installed and functioning
• ⚠️ Never operate spa with covers removed from electrical components

Important Notes

• ⚠️ This is an expander board – not a main control PCB
• ⚠️ This PCB is for BP200UX control boxes only
• ⚠️ Cannot be used with CB-EX231 blower expander
• ⚠️ Must not be fitted to any other device/product

🎯 Ideal Applications

Application	Suitability	Notes
♨️ BP200UX Spa Systems	✅ Direct fit	Primary application
♨️ Pump Upgrades	✅ Ideal	Add pump capability
♨️ Pump Expander Replacement	✅ Direct replacement	For faulty expander boards

This board is designed for:

• Adding a pump to BP200UX systems
• Replacing faulty pump expander boards in BP200UX systems
• Expanding pump capacity beyond main board limits
• Spas where pump expansion is preferred over blower expansion

❓ Frequently Asked Questions

Q: Is this a main control board or an expander? A: This is an expander board that works alongside your BP200UX main control board. It adds the capability to control one additional pump.

Q: Can I use this without a BP200UX main board? A: No, this expander board requires a BP200UX main control board to function. It cannot operate independently.

Q: Can I use this together with the CB-EX231 blower expander? A: No. This pump expander cannot be used in conjunction with the CB-EX231 blower expander. You must choose one or the other for your BP200UX system.

Q: What’s the difference between this and the VS520 expander? A: This expander is for BP200UX systems with 15A fuse protection and supports a general pump. The VS520 expander is for VS520 systems with 30A fuse and specifically supports 2-speed pumps.

Q: What size pump can I connect? A: The board supports a pump protected by a 15 AMP fuse. Ensure your pump’s current draw does not exceed this rating.

🔄 Balboa Expander Board Comparison

Feature	BP200UX Pump Expander	VS520 2-Speed Expander
Compatible System	BP200UX	VS520
Pump Type	Standard pump	2-speed pump
Fuse Rating	15 AMP	30 AMP
Dimensions	85mm × 41mm	118mm × 50mm
Voltage	230V / 50Hz	230V / 50Hz
Size	Ultra-compact	Compact

BP200UX Expander Options:

Option	Part Code	Function	Mutual Exclusion
Pump Expander	CB-EX233	Add 1 pump	Cannot use with CB-EX231
Blower Expander	CB-EX231	Add 1 blower	Cannot use with CB-EX233

🏆 Why Choose the Balboa BP200UX Pump Expander Board

• ✅ Genuine Balboa Part – OEM quality and compatibility
• ✅ 230V / 50Hz – Designed for UK electrical systems
• ✅ 15A Fuse Protection – Built-in overcurrent safety
• ✅ Ultra-Compact Size – Just 85mm × 41mm footprint
• ✅ Easy Integration – Connects to existing BP200UX system
• ✅ Proven Reliability – Balboa engineering quality
• ✅ Clear Compatibility – Specifically for BP200UX systems

🤝 Why Buy From Parts4Tubs

• ✅ UK-based company with local support
• ✅ Fast UK delivery
• ✅ Expert technical advice from spa specialists
• ✅ Competitive pricing
• ✅ Full warranty support
• ✅ Easy returns within 30 days (unfitted items)
• ✅ Compatible parts and accessories available
• ✅ Help with identifying correct replacement board

✨ Summary

The Balboa Expander Board Pump (BP200UX) is an ultra-compact expansion module designed specifically for BP200UX control systems. Operating at 230V / 50Hz, this board adds the capability to control one additional pump, protected by a 15 AMP fuse. With dimensions of just 85mm × 41mm, it’s the smallest Balboa expander available. Important: This board cannot be used in conjunction with the CB-EX231 blower expander – you must choose between adding a pump or a blower to your BP200UX system. This is an expander board, not a main control PCB – it requires a BP200UX main board to function.

Finding and identifying a replacement Hot Tub Circuit Board (PCB)

If you are looking to replace a failed PCB on your Hot Tub’s spa pack, then quite often identifying the part that you need can be the hardest thing.

Firstly, you are looking for a model number on the actual circuit board itself. Having the model or serial of your hot tub is not going to help at this point, you need to find the number on the PCB itself.

Now, with certain brands of PCB, the number of the replacement PCB that you need is not going to match identically the one you are replacing. Why is that I hear you ask?

Well, normally, it is an updated version. This means that it might have updated firmware on the PCB or be a later revision. Normally, this means that the part number would be slightly different. This is usually indicated with a “12345678 -x” at the end of that part number where x indicated a firmware revision.

In some cases, there will be some following letters on the part number of the circuit board, “12345678 -x MAS” this can indicate that the PCB was used for an OEM meaning it was produced for a certain hot tub manufacturer and the letters identify the manufacturer.

This means if you source an original PCB, it will not have the letters, but will in most cases work just fine.

It can be confusing I know!

What if you can’t find a model number?

If you can’t find a model number on the PCB itself, then you need to look for a model number on the spa pack. Normally, there is a sticker on the outside of the spa pack that tells you the current ratings and input voltages etc and this will have a model number.

In general, most spa packs in the USA are manufactured by Balboa, Hydro-Quip, ACC or Gecko. I know I am generalising here, but if you have a spa pack that has the brand of your hot tub on, it will be an OEM so the key is identifying who made the original box.

From there, you can normally find an original PCB that you will be able to switch out.

For example, the Balboa VS (value series) is a very popular spa pack that has been used by multiple hot tub manufacturers under their own brand names. Whatever they have called it, strip it back and it is still a Balboa VS.

Visual Inspection

One of the most important things you can do when you are looking for a replacement is to visually inspect the PCB that you have versus the picture online of the replacement you are considering. They need to look the same even if there are the differences in firmware revisions or OEM part numbers, you should be visually replacing a PCB that looks like the one you have.

Configuring a replacement Hot Tub Circuit Board (PCB)

When you get a new PCB, you are more than likely going to need to configure it. Most PCBs have a number of different modes and setups that the can operate in. For this, you will need to manual or spec sheet to guide you.

For things like DIP switches, most of the time you can copy the settings from your original circuit board.

You may need to move jumpers or even wires to configure voltages – the key here is that you read the schematic and don’t expect the PCB to just work out of the box – it usually doesn’t.

Troubleshooting a Hot Tub Circuit Board (PCB)

Here are some common things you will see when you replace a PCB on a hot tub.

You press the buttons on the topside control and they don’t control the right parts (pumps or blower etc) – this is a mode configuration thing and you will either need to change some DIP switches on the PCB or an internal or low level programming mode on the topside control. Check the manual for how to do this.

To check this, unplug all of your kit – heater, pumps, blower and then turn on the PCB. If it trips with nothing plugged in, usually the voltage is incorrectly set and what is happening is that live current is being sent to the ground – because you have 4 wires into the PCB rather than 3. Current on the ground loop causes the trip. Check the settings to make sure it is configures for 230V.

It might not trip until you physically turn on a pump or a blower.